Avi to Mpeg is a first application in a larger project with the aim to give users a free tools to easily convert ANY format to ANY format. However if you need a "All in one" solutions for multiple conversion formats in one program, here are our recommendations. They come with a price though.
iSkySoft - Focusing on Apple Mac software and probably the best conversion suite of programs for Mac platform around.
Movavi Video Converter - Hugely popular converter and ripper for Video and Dvd, saves for iPod, iPhone, PSP, PDA adn cell phone. True quality software.
XiliVideo - Another popular and excellent group of converters with support for all formats and multiple exporting capabilities.
Video X Converter - Multiple products, nice all around converter and a DVD cloner to convert and copy your DVD's.
Aiseesoft - A number of great conversion tools for both PC and Mac, Ipod and IPhone converters.
Total Media Converter - Huge number of quality converters
DVD to iPhone Converter - Name says it all, converts your movies to watch on Ipod into mpeg4 format.